Abstract: A New type of benzoxzine precursors was systhesized based on methoxy methylene diphenyl ether oligomer.The struture of product was characterized by IR and H-NMR analysis and effects of solvent polarity,temperature on the precursor composition were investigated.The results obtained show that ring content in the composition is more than 80%, the composition of the precursors depended upon mainly the polarity of the reaction medium or solvent.